doi:10.7289/V5/CR-OER-EX1605L1 NOAA Ocean Exploration Program 2016 Deepwater Exploration of the Marianas EX-16-05 Leg 1 Cruise Report Guam and the Commonwealth of the Northern Mariana Islands Guam to Saipan, Northern Mariana Islands Dr. Deborah Glickson, Science Lead, Florida Atlantic University, Harbor Branch Oceanographic Institute Dr. Diva Amon, Science Lead, University of Hawaii at Manoa Lindsay McKenna, Mapping Lead, NOAA Office of Ocean Exploration & Research Kelley Elliott, Expedition Coordinator, NOAA Office of Ocean Exploration & Research April 30, 2017 NOAA Office of Ocean Exploration and Research 1315 East-West Hwy, SSMC3 RM 10210 Silver Spring, MD 20910 -1- Table of Contents 1. Introduction ............................................................................................................................ 3 2. Objectives ............................................................................................................................... 5 3. List of Participants .................................................................................................................. 6 4. Methodology ........................................................................................................................... 9 4.1 ROV seafloor surveys ........................................................................................................... 9 4.2 Specimen collections ............................................................................................................ 9 4.3 Seafloor mapping ...............................................................................................................10 4.4 Education and outreach activities .........................................................................................10 5. Clearances and Permits ..........................................................................................................11 6. Expedition Schedule ...............................................................................................................12 7. Expedition Map......................................................................................................................14 8. Results ...................................................................................................................................16 8.1 ROV seafloor surveys ..........................................................................................................16 8.2 Specimen collections ...........................................................................................................20 8.3 Seafloor mapping ...............................................................................................................27 8.4 Education and outreach products .........................................................................................29 9. Conclusion .............................................................................................................................30 -2- 1. Introduction NOAA OER Okeanos Explorer Operations NOAA’s Office of Ocean Exploration and Research (OER) is the only federal organization dedicated to exploring our unknown ocean. OER works with partners to identify priority areas for exploration; support innovations in exploration tools and capabilities; and encourage the next generation of ocean explorers, scientists, and engineers. The publicly available data and information gained from our expeditions and the research we fund gives resource managers, the academic community, and the private sector the information they need to identify, understand, and manage ocean resources for this and future generations of Americans. NOAA Ship Okeanos Explorer is the only federal vessel dedicated to exploring our largely unknown ocean for the purpose of discovery and the advancement of knowledge about the deep ocean. America’s future depends on understanding the ocean. We explore the ocean to make valuable scientific, economic, and cultural discoveries, and we explore because ocean health and resilience are vital to our economy and to our lives. Exploration supports NOAA mission priorities and national objectives by providing high-quality scientific information about the deep ocean to anyone who needs it. In close collaboration with government agencies, academic institutions, and other partners, OER conducts deep-ocean exploration expeditions using advanced technologies on the Okeanos Explorer. From mapping and characterizing previously unseen seafloor to collecting and disseminating information about ocean depths, this work helps to establish a foundation of information and fill data gaps. Data collected on the ship follow federal open-access data standards and are publicly available shortly after an expedition ends. This ensures the delivery of reliable scientific data needed to identify, understand, and manage key elements of the ocean environment. 2016 Deepwater Exploration of the Marianas Expedition The 2016 Deepwater Exploration of the Marianas Expedition is the fourth in a series of expeditions that comprises the “Campaign to Address Pacific monument Science, Technology, and Ocean Needs” (CAPSTONE). CAPSTONE is a major multi-year foundational science effort to collect baseline information in unknown and poorly known deepwater areas of U.S. marine protected areas in the central and western Pacific Ocean. Previous expeditions have focused on collecting baseline information in and around the Papahānaumokuākea Marine National Monument, and the Johnston Atoll and Wake Island Units of the Pacific Remote Islands Marine National Monument (PRIMNM). Future expeditions are planned to explore additional Units of PRIMNM, Rose Atoll Marine National Monument, the National Marine Sanctuary of American Samoa, and likely the Phoenix Islands Protected Area. -3- The Marianas Trench Marine National Monument (referred to here as “The Monument”) was established in January 2009 through a presidential proclamation under the authority of the Antiquities Act of 1906. The Monument was established for the purpose of protecting objects of interest such as the subduction system in the trench, submerged volcanoes, hydrothermal vents, coral reef ecosystems, and biologically diverse ecosystems where chemosynthetic and photosynthetic organisms exist side by side. The Monument consists of three units: the Islands Unit, the Volcanic Unit, and the Trench Unit. The Volcanic Unit and the Trench Unit are additionally designated as National Wildlife Refuges, the “Mariana Trench National Wildlife Refuge” (aka “Trench Unit/Refuge”) and “Mariana Arc of Fire National Wildlife Refuge” (aka “Volcanic Unit/Arc of Fire Refuge”). The Islands Unit encompasses the waters and submerged lands of the three northernmost Mariana Islands (Farallon de Pajaros, Maug, and Asuncion) from the mean low water line to approximately 50 nautical miles offshore. These waters include healthy coral reefs made up of roughly 300 different coral species and a very high density of top predators, including large numbers of sharks. The Volcanic Unit/Arc of Fire Refuge includes the submerged lands within a one nautical mile radius of the center of each of the 18 active submarine volcanoes and hydrothermal vents in the region. Hydrothermal vents have some of the harshest conditions on the planet, including extremely high temperature water and highly acidic fluids. Even so, there are many species that make vents their homes, including some that are found only at these habitats. Vent communities include animals that have developed symbiotic relationships with chemosynthetic bacteria, such as tubeworms, shrimp, and mussels, as well as other animals like snails, anemones, and squat lobsters. The Trench Unit/Refuge encompasses the submerged lands within the Mariana Trench, extending from the northern limit of the U.S. Exclusive Economic Zone (EEZ) of the Commonwealth of the Northern Mariana Islands (CNMI) to the southern limit of the EEZ adjacent to the U.S. Territory of Guam. This part of the Monument is approximately 940 nautical miles long and 38 nautical miles wide along the Mariana Trench seafloor. It includes Sirena Deep at about 10,700 m (35,000 feet), the second deepest point on Earth, remarkable for its steep walls, distinctive geologic features, and deep-ocean life forms. The deepest areas of the Mariana Trench are likened to an inverted chain of islands, where each “peak” points downward, and like islands, each feature can be geologically and biologically unique. The unique geology, geochemistry, rare biological conditions, and pristine ecosystems of the Monument provide an ideal location for interdisciplinary research. Because the area has a -4- distinct position in the biogeography of the Pacific as a place where a high number of regional endemic and unusual species assemblages thrive, the Mariana Archipelago and Monument holds outstanding potential for making globally significant scientific contributions. Despite decades of previous work in the region, much of the Monument and surrounding areas remain unexplored. The three legs of the 2016 Deepwater Exploration of the Marianas expedition worked within the U.S. Exclusive Economic Zone of Guam and the CNMI to help identify and better understand new geological phenomena and habitats – such as extreme life living in the deepest oceanic trench on the planet, enormous mud volcanoes, active hydrothermal vents, chemosynthetic communities, and possibly deep-sea coral and sponge habitats. Large deep-water areas of the Monument